Bearing for spindles



(No Model.)

W. F. DRAPER.

BEARING FOR SPINDLBS.

No. 316,016. Patented Apr. 21; 1885.

Wikr E E1 5 E '5 U ITED STATES sP-ATENT- ()FFIcE.

XVILLIAM F. DRAPER,-OF HOPEDALE, MASSACHUSETTS. I

BEARING FOR SPINDLES.

SPECIFICATION forming part of Letters Patent No. 316,016, dated April 21, 1885. Application filed Februarys, 1884. (No model.)

To aZZ whom it may concern.-

Be it known that I, WILLIAM F. DRAPER, of Hopedale, county of XVorcester, State of Massachusetts, have invented an Improvement in Bearings for Spindles, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

My invention consists in a spindle, a bolstercase provided near its lower end with alug, and a bolster placed in the said case loosely and slotted at its upper end, combined with a step pivoted to the said bolster, a part of the footstep being removed, the remaining part of the footstep being provided with an extension to enter the lower end of the bolster, and with a groove to engage the said lug, as will be described; also, in a spindle, a bolster-case closed at its lower end and provided with a lug, 5, and a bolster placed therein loosely and provided at its upper end with a slotted head, combined with a step pivoted to the bolster and provided with an extension, 2, to enter the lower end of the bolster, and with a groove to engage the said lug; also, in a bolstercase, spindle, and bolster provided with a head, and a footstep having an upward extension entering thelower end of the bolster-case loosely, combined with the elastic or yielding packing interposed between the said bolster and bolster-case.

Figure 1 represents a step-rail, bolster-case, bolster, elastic packing, nut, and whirl in section, the spindle being in elevation. Fig. 2 is a section of the footstep on the dotted line a: m, and Fig. 3 is a top view of the bolster.

The bolster-case A and step-rail B are substantially as in United States Patent No. 227,129. The lower end, 0", of the spindle 0, provided with an attached sleeve-whirl, D, enters the bolster a, placed loosely in the bolster-case, the bolster being surrounded, preferably, with a fibrous or yielding packing. The head a of the bolster a is enough smaller externally than theinterior of the bolster-case so that when the bolster stands vertically in the bolster-case the said head does not touch thebolster-case. The lower end of the bolster is placed upon an extension, 2, of the footstep 6, there being a very narrow or thin space between the exterior of the said extension and the interior of the bolster when the latter is in its normal position. The lower end of the bolster is attached to the footstep by means of. a pin, 12, passed through the said extension lower end, the said holes being of larger di ameter than the pin, and consequently the bolster may have a Very slight movement laterally on the extension of the footstep, the space between the said parts being filled by a thin film of oil. The lower end of the foot step e is cut away at one side, as shown at h,

as shown at 8, Fig. 2, to receive a lug, 5, connected with the bolster-case. The footstep and the bolster connected with it by the pin 12 are placed loosely in the oil-well formed in the bolster-case, with the cut-away portion h of the footstep in line with the lug 5 until the groove 8 is brought opposite the said lug, when, by means of a screw-driver, the end of which is placed in a slot in the upper end of the bolster, the latter, together with the footstep, is turned partially around, causing the groove 8 in the step to engage the said lug 5, so that the said bolster will not thereafterrotate with the spindle, nor can it be lifted from the bolster-case until the bolster and footstep have been partiallyrotated in the opposite direction. The pull of the band comes uponthe whirl at a point between the ends of the bolster, and the band does not, therefore, act to deflect the spindle from its perpendicular position.

In practice each end of the bolster may move radially for a small distance, and preferably for like distances, thus preventing the deflection of the spindle from its true perpendicular position, as would be the case if the bolster could move radially at one more than at its other end.

I prefer to usethe elastic packing f external to the bolster to avoid chattering or slight unsteadiness in running; yet I may omit it and let the bolster stand in oil, which lies in films both inside and outside the bolster.

Prior to this invention it has been attempted to press the footstep down into the chamber in the bolster-case and retain it there by friction alone; but great difficulty has been experienced in retaining the step in place, forthe into holes made through the bolster above its and another part thereof is grooved annularly,

ster and the step jointed to or connected with it may be lifted from the bolster-case.

The bolster herein described, provided at its upper end with a head, o of greater diameter than that of the body of the bolster, and receiving in its lower end an upward extension of the footstep, limits the movement of the bolster at each end, and consequently regulates the degree of compression of the elastic or yielding packing interposed between the bolster and bolster-case, which in practice is important, for thereby the wear of the packing is lessened, and the spindle, in case of excessive band-tension, is not permitted to get so far from the center of the usual spinning-ring as when the said head and footstep extension are omitted and the packing has to stand all the extra strain due to the band-pull.

I claim- 1. The spindle, the bolster-case provided with the lug 5, and the bolster placed therein loosely and provided with the head a and slotted at its upper end, combined with the step pivoted to the said bolster, apart of the footstep being removed, the remaining part of the footstep being provided with an extension, 2, to enter the lower end of the bolster, and with a groove to engage the said lug, substantially as described.

2. The spindle, the bolster-case closed at its lower end and provided with a lug, 5, and the bolster placed therein loosely and provided at its upper end withaslotted head, a combined with the step pivoted to the said bolster, and provided with an extension, 2, to enter the lower end of the bolster, and with a groove to engage the said lug, substantially as described.

3. The bolster-case, spindle, and the bolster provided with the head a", and the foot-step having the upward extension entering the lower end of the bolster-caseloosely, combined with the elastic or yielding packing interposed between the said bolster and bolstercase, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

VM. F. DRAPER.

' Witnesses:

EBEN S. DRAPER, WM. J. WooDs. 

